Colviu l



C. L-.'10HNS0N.

LOCK.

' APPLICATION FILED MAR. lo. |919.

,326,270. Patented Dec. 30,1919.

mfg

f baggy/wwf@ by' f A 'Be it known that I, a citizen of the United iirurn ene-ATN '@FFME@ COLVIN L. JOHNSON, OF CHICAGO, ILLINOIS.

Y 1o' all 07mm it 'may concern.'

CoLvIN L, JOHNSON, States, and a resident of thecity of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locks; and

full, clear, V l reference being had to the accompanying drawings, and to the numerals .of reference I do hereby declare that the following isa and exact description of the same,

marked thereon, which form a part of this specification.

f until these pins constructed This invention relates to locks-of the type in which a cylinder is prevented from rotating by a series of pins of different lengths have been amounts supplementary to their differences in length.l The well-known Yale locks are of this type and have 'been used for a variety of purposes. In the present case the lock is more particularly designed for use in vconnection with safety devices for automobiles.

and' in particular to locks on automobile shift levers, although not limited to such use. In locks of the Yale type as heretofore the parts have been made of brass or other relatively soft material so that `sshown in the it is easy to drill into the face of the lock escutcheon in order to cut off the pins so that the rotating cylinder maybe turned without aspecial key.

.The principal. obj ect, therefore, vention is to provide means whereby drilling through the face of the lock may be preventedf -V Other'and further *important objects of this invention will be apparent from the disclosures in the Aspecification `and drawings.

The invention .('in'a preferred form) is illustrated in the drawings and hereinafter more fully described.

In' the drawings: v Figure 1 is a side elevation partly in section of a change speed lever comprising a Yale lock embodying my invention.

Fig. 2 is a front elevation of-theescutcheon of the lock.-

I Fig. 3 is a ,section on the line 3-3 of Fig. 2. l Fig.v 4 is a section on drawings: i

'4 1, represents a change speed lever having i a spherical part 2, about which the lever turns as a pivot for the purpose'of selecting- Specification-of Letters Patent. ApplicationV led March 110i, 1919.

` gears.

. to the link 3, by means of a vdepressed by.

of my inthe line 4 4 of Patented nee-eo, 1ere.; serial nq. 281,647. 1

Movement of the change' speed lever is prevented, while the car' is not in use, means cfa link 3, operating locking means not shown. Thelink 3, is reciprocated in a slot 14.-, in the change speed lever, by means of a Yale lock 4.. For this purpose the ro` tating cylinder 6, of the lockaisconnected crank 5.

The lock escutcheon comprises a cylinder 6 adapted to rotate eccentrically in a cylin-` dricalblock or case 7. Aseries of holes are drilled inthe case 7 and thev cylinder 6, perpendicular to the action of rotation of the latter for the reception ofvpairs of pins 8 and 9. As shown, the pins 8 are of equal` length but the length of the pins 9 varies so that each of the pins 9, must be depressed to a different amount in order to bring the junction line -between the pins 8 and 9 into register with the outer face of the cylinder 6 vso that the latter may vrotate within the case 7. ',The usual key hole slot 10, is pro It is evident that the cylinder 6 would'be l free to rotate in the case 7, if a holefwas drilled along the line of contact of the cylinder with the case so as to cut off the pins at. that point. Similarly a hole drilled in the case 7, so asto cut the pins off flush with the ,outer surface of the cylinder 6, would have the same result. In the same way a hole drilled inthe cylinder 6 so as to cut the `pins ott1 flush with the inner surface of thedcase 7 would allow the lock to be operate ever, 1n order to prevent the drilling of the lock, hardened Isteel plates are arranged to cover `the pins adjacent the line of contact According to the Apresent invention howof the cylinder and casing. This may be con-` veniently accomplished by providing a har a! ened steel cap 12 which covers the whole outer surface of the lock, except that occupied by the cylinder 6. .This cap 12 is preferably flanged las at 13 in order to prevent a tool bein inserted'between the edge of the cap am? the case 7 for prying it away from the lock. A. Y

Inthe cylinder, a hardened steel segment 15 is inserted in a lateral slot in line with the point where th 7 to the cylinder. In this way, all drilling'l' e plus pass from the case 15.07'

of holes which would result in cutting the lock pins along the line of contact of the cylinder and case is avoided.

struction may be varied through a Wide range without departing from the principles of this invention, and I therefore, do not purpose limiting the patent when granted otherwise thannecessltated by the prior art.

I claim' as my invention:

1. A lock of the type described, comprising a case, a cylinder adapted to rotate therein, a seriesof pairs of pins therein of unequal length, extending from the case into the cylinder, a hardened steel flanged cap covering the entire front of the case not occupied by the end of the cylinder and' a hardened steel segment inserted laterally in the cylinder in hne with the points'where the pins extend from the case to the cylinder, whereby cutting the pins by drilling from the front of the lock is prevented.

2. lock escutcheon comprising a cylindrical lock casing, a hardened steel flanged cap therefor, the flange of which is arranged in an annular recess in the casing so that its outer 4surface is flush with the casing, a

lateral projection at the opposite end of the I caslng to prevent "re1noval of the lock from I am aware that various detalls of conf the aperture in which it is located, a cylinder adapted to rotate in the casing, a series of pairs of pins extendingfrom the case into vthe cylinder and a'hardened steel insert in the cylindery in line with the points to 'Where the pins extendv from the casin into the cylinder.

3. A lock escutcheon comprising a cylin drical lock casing, a hardened steel flanged cap therefor, the ange of which is arranged in an annular recess in the casing so that its outer surface is flush with the casing, a

cylinderadapted to rotate in the casing and l' a hardened steel insert in thecylind'er in line with the. points where the pins extend from,

the casing into the cylinder.

In testimony whereof I- have hereunto subscribed my name in the presence of two subscribing witnesses.

COLVINL.' JOHNSON.

Witnesses:

EARL M. HARDINE, LAwRENcER REIBSTEIN. 

